Going back to the DOE- how to resign from LI

I have been offered a job back in NYC in a good school, as i have been very unhappy in my current position on LI. One big reason behind me leaving is that I am math/spec ed certified, with all of my previous experience in that field. My current position has me teaching in all 4 subject areas. So my question is:

How would you go about telling your current boss you are leaving, and does anyone know how it works mid-year?

Going back to the DOE- how to resign from LI

Under state law, you have to give 30 days notice. If the DOE wants you to start sooner, your current district can waive the 30 days.

I would tell your boss on Monday you accepted a position you think is a better fit and ask how/when they want you to put resignation in writing.